Welcome to Better Know An Umpire, an effort to educate ourselves on the human elements who have ultimate decision-making power over some 2,500 Major League Baseball games a year. (All cumulative statistics are through the 2011 season, unless otherwise stated.)

Claim to fame: For ejecting Giants catcher Benito Santiago from a 2001 game in which Fletcher spiked the ball in front of him and demanded he throw it back to pitcher Livan Hernandez. (Fletcher's throwing hand had been broken by a foul ball some days earlier and the swelling had gotten worse during the Giants game.)

If you believe the best measure of an umpire is his R/9, then you believe Andy Fletcher is among the very best pitchers' umpires. ... Just having Fletcher call pitches reduces offense by 11 percent. ... You would expect a high ejection rate from Fletcher, driven by unhappy hitters and their protective managers. At 2.6 percent his ejection rate is higher than average, but not outrageously so.

True fact: One of the few MLB umpires who wears a mouthguard, which helps cut down on concussions and other injuries. A smart move on his part, though he's already had to leave two games this season due to injuries.

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On umpiring: "It's difficult to be away from home as much as we are. ... We do get four weeks of vacation during the season, but when we're gone, there's no help at all at home for mom with a 5-year-old. So when I come home on vacation or during the winter, I take over cleaning, chasing him around. It's her vacation."